This is a note to let you know that I've just added the patch titled
drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-ringbuffer-exclude-last-2-cachlines-of-ring-on-845g.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 27c1cbd06a7620b354cbb363834f3bb8df4f410d Mon Sep 17 00:00:00 2001
From: Chris Wilson <[email protected]>
Date: Mon, 9 Apr 2012 13:59:46 +0100
Subject: drm/i915/ringbuffer: Exclude last 2 cachlines of ring on 845g
From: Chris Wilson <[email protected]>
commit 27c1cbd06a7620b354cbb363834f3bb8df4f410d upstream.
The 845g shares the errata with i830 whereby executing a command
within 2 cachelines of the end of the ringbuffer may cause a GPU hang.
Signed-off-by: Chris Wilson <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/gpu/drm/i915/intel_ringbuffer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -863,7 +863,7 @@ int intel_init_ring_buffer(struct drm_de
* of the buffer.
*/
ring->effective_size = ring->size;
- if (IS_I830(ring->dev))
+ if (IS_I830(ring->dev) || IS_845G(ring->dev))
ring->effective_size -= 128;
return 0;
Patches currently in stable-queue which might be from [email protected]
are
queue-3.0/drm-i915-ringbuffer-exclude-last-2-cachlines-of-ring-on-845g.patch
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